Rad oehlmann



(No Model.)

B. H. 0. OEHLMANN. INGANDESOENT LIGHT BURNER.

No. 593,365. Patented Nov. 9, 1897.

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. UNITED STATES PATENT OFFICE.

EMIL HEINRICH CONRAD OEHLMANN, OF BERLIN, GERMANY.

IN CAN DESCENT-LIG HT BURNER.

SPECIFICATION forming part of Letters Patent N0. 593,365, dated November 9, 1897. Application filed May 4, 1896. Serial No. 590,209. (No model.)

To all whom it may concern:

Be it known that I, EMIL HEINRICH CON- RAJ) OEHLMANN, engineer, a subject of the King of Prussia, and a resident of the city of Berlin, Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Incandescent-Light Burners, of which the following is a specification.

This invention relates to a burner for incandescent light which will furnish a powerful yet uniform flame. This object is attained in that the burner-head is formed. of concentrically-arranged tubes, leaving enough space between them to allow the access of the air to the flame, the tubes being provided with partitions inserted therein for producing a uniform flame.

The arrangement is illustrated in the-accompanying drawings, in which Figure l is a longitudinal section thereof. Fig. 2 is a plan View of the burner-head; Fig. 3, a section of a burner-tube with resistances or partitions inserted and a plan View of the arrangement of differently-constructed partitions or resistances in the burner-tubes. Figs. 4 and 5 show a profile and a plan view of a burner-head in which the partitions or resistances, combined with the tubes, consist of a ring which is inserted in corresponding recesses in said tubes and forms at the same time a connection between the extremities of the burner-tubes.

The mixing-chamber a, in which. a sieve b is introduced, in the well-known manner, in order that the gas and airstreaming into the same will mix more thoroughly, is shut ofi by a burner-head A, which consists of a cap or bottom plate 0, in which concentric burnertubes d are inserted, which contain partitions or other resistances e, in order to produce an intense and at the same time uniform flame by their cooperation with the air-inlets f, provided between the little tubes d.

'A cone g, directed downward, may be provided, as shown, below the bottom 0 of the burner to serve as outlet for the mixture of gas and air, but a full working heating flame can be produced without this additional construction.

The partitions or other resistances e in the tubes 01 can be made of simple sheet-metal strips, or they can consist of parallel sheetmetal strips or of strips reinforced in the center, as shown in Fig. 3. In short, they can have any desired shape, but they must be arranged inside the tubes 61 and be of suitable diameter, and preferably being located at the upper part, as shown, in order that the flame may be powerful and uniform.

Figs. 4 and 5 show a form of construction in which the resistances inserted in the small tubes consist of a ring which enters correspondin g recesses in the tubes, establishing at the same time a connection between the same. v

A burner for incandescent lights comprising a series of tubes or channels adapted to produce an intense quiet flame, each of said channels having a partition or resistance near its exit by which each tube may be made sufficiently wide ,to avoid obstructions and to provide an intense flame, said partition extending for a short distance within the dis- 

